Reply To: Issue with writing data to DESFire EV1 & EV2

Forum MIFARE and NFC Reader IC`s Issue with writing data to DESFire EV1 & EV2 Reply To: Issue with writing data to DESFire EV1 & EV2

Re: Issue with writing data to DESFire EV1 & EV2

8. September 2020 at 12:38
Hi Søren,

I assume, the issue is in your reader. Generally, you can read any size of data block from the card. Here you must take attention, the reader buffer is limited. First, there is a reader buffer in card, and also buffer in the transport chain. But if you use larger blocks, automatically read extension will be used. This is not efficient, therefore I would not read more than 64 bytes in one chunk. 32 bytes data blocks should not be a problem.

Is it possible for you, to verify your software with a different approach? I mean you can check your software with a simple PC/SC USB reader and a desktop software. Or, if possible, with a simple Android app and TapLinx SDK. There is no GUI required, only the NFC communication and log output is needed to verify your reader implementation.

The TapLinx team

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